From Fallen London Wiki

okay, putting my money on the table. they're adding "waswood, but for the ambitions you didn't do". that is where one shall practice knowing how the future springs from the past. that is where a diptych, of you and someone you could have been, will prove helpful. tying it all to a new magcat is a clever way to even the playing field, too, so that it can accomodate both fresh ambitioncompleters and seasoned at-the-content-boundary veterans. this is also what the apocryphon was foreshadowing. it all makes too much sense